Back-lining feed for book-cover-making machines



C. SCHRAMM Aug. 13, 1929.

BACK LINING FEED FOR BOOK COVER MAKING MACHINES Filed June 27, 1928 2 Sheets-Sheet Aug. 13, 1929. c SCHRAMM 1,724,047

BACK LINING FEED FOR BOOK COVER MAKING MACHINES Filed June 27, 1928 2 Sheets-Sheet 2 Patented Aug. 13, 1929.

UNITED STATES PATENT OFFICE.

CARL SCI-IRAMM, OF WEST HARTFORD, CONNECTICUT, AESSIGNOR TO THE SMY MANUFACTURING COMPANY, OF HARTFORD, GONN'ECTIC'ETI, A CORPORATION (ll? CONNECTICUT.

BACK-LINING FEED FOR BOOK-COVER-IJAKING MACHINES;

Application filed Jane 27,

In machines for making book covers of the type illustrated in patent to Jacobs N0.5S0,- 111, April 6, 1897, a gluedsheet of cloth is drawn over a platform, and stifiboards and a paper back-lining are fed in, picked up and deposited on the glued surface of the cloth sheet, the edges of which are then told ed over the boards and back-lining. This invention relates to the mechanism which employed in such machines for feeding the paper back-lininginto position tobe picked up and transferred to the cloth sheet.

The object of the present invention is to provide a mechanism for feeding the paper back-lining strip from a continuous roll, which will operate with an easier movement andwith less liability of breaking or tearing the paper when it is fed, than the mechanism employed for the purpose in the present machines.

This object is attained by transmitting the reciprocations of a rack to the rolls which are rotated bya ratchet and pawl mechanism for feeding the paper back-lining, by

r means of an interposed crank motion. that will start the feed gently, increase in speed to the desired degree, and then slow down at the finish of the feed, whereby the paper strip isrelieved ofsudden pull and shock and thus does not become torn or broken.

in the accompanying drawings Fig. 1 shows an elevation looking atone side of the back-lining feed mechanism. Fig. 2 is a similar view looking at the other side. Fig. 3 is a top view. Fig. 4: is an end elevation. Fig. 5 is a section on the plane indicated by the dotted line 5-5 on Fig. 1. 1

This mechanism is supported by a frame comprised of side plates 1. and back; plate 2, which back plate is designed to be fastened to a wall of the main frame of a machine of the class illustrated in the patent above referred to. v

A toothed rack 3 is supported by a bracket 41 attached to the inside ofone of the frame plates and is reciprocated at the proper times by suitable mechanism. This rack engages a gear 5 which is normally loose on a shaft 6 that is supported by the frame side plates. A clutch 7 is arranged to slide on the hub 8 of a gear 9 that is fastened to the shaft, for the purpose of connecting the gear 5 with gear 9 and the shaft. Engaging the gear 9 is an arcuate rack 10 at the upper end 1928. Serial No. 288,?40.

of a rocker llwhich mounted on a shaft 12 that is supported by the side walls of the frame. On one face of this rocker is a guideway 18 in which a block 141; is fitted. This block is adjusted along the guideway radiallyofthe axis of the rocker by means of a threaded spindle 155 that passes through the shaft 12 and through the block let. A stud 16 extends from the side of this block 1d and pivoted on the stud a block 17 that fitted in and has a free moven'iei'it along the opening in the fork of a rocker 18. The rocker 18 is pivoted on a stud 19 that is supported by one of the side plates of the frame, and it has an arcuate rack 20 which engages with a gear 21 that loose on a shaft 22 supported by the frame side walls.

hastened to the gear 21 is a ratchel wheel. 23, and fixed to the shaft adjacent to the ratchet wheel is a pawl carrier 24.- upon which are mounted pawls 25 that engage with the teeth of the I't chetwheel. The pawls preferably are dillerentially spaced about the ratchet wheel so as to ensure an engagement of at least one of the pawls with a tooth of the ratchet wheel without lost motion. The pawls are yieldingly held in engagenn-znt with the ratchet wheel teeth by plungers 26 mounted in the carrier. (in the outer end of the shaft 22 is a gear 2'? that meshes with intermediate gear 28 which meshes with a gear 29 on the shaft 31) of one of the back-lining feed rolls 31. The shaft 32 on the other feed roll 33 has a gear 341: that meshes with the gear 29.

As the rack b is moved in one direction it turns the gear 5 and this, with the clctch 7 engaged, turns the gear 9 and causes it to swing the rocker 11, and the block 14 that this rocker carries swings the rocker 18. The rocker 18 through its curved rack turns the gear 21 and ratchet wheel 23, and the engagement of the pawls with the ratchet wheel turns the pawl carrier 2%, the shaft 92 to which the pawl carrier is fixed, and the gear 27 fixed to the shaft, which gear drives the feed roll gears and causes the rolls to feed the paper back-lining strip the re quired distance along the paper guideway 36. On the return movement of the rack the teeth of the ratchet wheel slip under the pawls so that the feed rolls are not turned. flfhe amount of feed of" the paper deter mined by adjusting the distance of the block 14, that connects the rocker 11 with the rocker 18, from the axis of the rocker 11, and as this block can be closely adjusted by means of the threaded spindle 15 the amount of feeding movement of the feed rolls can be accurately fixed.

The paper strip is drawn from a continuous roll 37 that is thrust upon the spindle 38 which is supported by an arm 39 that I at its upper end is fixed to the frame of the machine. The paper roll is retained in place 7 on the spindle by an arm 4L0 that is fastened thereto at the other side of the roll.

to and extends parallel with the arm 39 at one side ofthe roll, and by an arm 41 that is pivoted to the arm 39 and extends parallel It is customary in operating the machine to place a number of rolls side by side on the spindle, one being located between the two guide arms 40 and 41. lVhen a roll is exhausted the pivoted guide arm 41 is swung up and the adjacent roll on the spindle is slipped between the arms and then the pivoted arm is returned.

For the purpose of imparting the desired tension to the strip it is led from the roll past two spaced pins 42 and 43 and over a pin 44 which extend transversely from the arm 39. 'The strip is pressed into the space between the pins 42 and 4L3 to secure the required friction, by the toe 45 of a lever 46, the axis 47 of which is clamped to the arm 39 by a nut 48.

The strip of paper after passing from the tension device is led between cutters 49 which trim the edges and thus determine the width of the back-lining. From the trimmers the strip passes to the feed rolls 31 and 33 and then is intermittently advanced by the mechanism described along the guideway 36 for further manipulation as usual.

As a result of the interposition between the rack actuated driving mechanism and the ratchet and pawl driven mechanism, of the two rockers the motion which is transmitted from the actuating rack to the feed rolls commences slowly and gradually increases to full speed and then gradually decreases until the feed stops, which motion permits a quick feed of the paper without any sudden pull orjerk which would tear or break the paper or to cause the rolls to slip on the paper and result in a faulty feed. hen a roll of paper is exhausted another roll can be quickly substituted and the required tension given to ensure a correct feed of the strip.

The invention claimed is: 1, Mechanism for rotating the back-lining feed roll gears of a. book case-making machine comprising a reciprocatory rack, a shaft bearing a gear rotated from said rack, an oscillatory rocker with an arcuate rack engaged by said gear, an oscillatory rocker with an arcuate rack, and adjustable connection between said rockers, a shaft carrying a gear engaged by the latter rocker, a ratchet and pawl mechanism rotated by said gear, and a gear driven by said ratchet and pawl mechanism and adapted to drive the feed roll gears.

2. Mechanism for rotating the back-lining feed roll gears of a book case-making machine comprising a reciprocai'ory rack, a shaft bearing a loose gear, a iixed gear and a clutch, said loose gear being engaged by the rack and the clutch adapted to connect and disconnect the loose and the fixed gears, an oscillatory rocker with an arcuate rack engaged by said fixed gear, an oscillatory rocker with an arcuate rack, an adjustable connection between said rockers, a shaft carrying a gear engaged by the latter rocker, a ratchet and pawl mechanism rotated by said gear, and a gear driven by said ratchet and pawl mechanism and adapted to drive the feed roll gears.

Mechanism for rotating the back-lining feed roll gears of a book use-making machine comprising a reciprocatory rack, a shaft bearing a gear rotated from said rack, an oscillatory rocker with an arcuate rack engaged by said gear, an oscillatory rocker with an arcuate rack, an adjustable connection between said rockers, a shaft carrying a loose gear engaged by the latter rocker, a ratchet wheel connected with said gear, a pawl carrier fastened to said shaft and bear ing pawls engaged with said ratchet wheel, and a gear fixed to said shaft and adapted to drive the feed roll gears.

4. Mechanism for rotating the hack-lining feed roll gears of a book case-making ma chine comprising a reciprocatory rack, a shaft bearing a loose gear, a fixed gear and a clutch, said loose gear being engaged by the rack and the clutch adapted to connect and disconnect the loose and the fixed gears, an oscillatory rocker with an arcuate rack engaged by said fixed gear, an oscillatory rocker with anv arcuate rack, an zuljuslable connection between said rockers, a shaft carrying a loose gear engaged by the latter rocker, a ratchet wheel connected with said gear, a pawl carrier fastened to said shaft and bearing pawls engaged with said ratchet wheel, and a gear fixed to said shaft and adapted to drive the feed roll gears.

CARL SCHRAMM. 

